<template>
	<div class="my-tab-bar">
		<div class="tab-item" v-for="(item,index) in arr" :key="index" :class="{ current: activeIndex === index }" @click="change(index, item.componentName)">
			<!-- 图标 -->
			<span class="iconfont" :class="item.iconText"></span>
			<!-- 文字 -->
			<span>{{item.text}}</span>
		</div>
	</div>
</template>

<script>
	export default {
		data() {
        return {
            activeIndex: 0, // 选中的导航下标，默认为0，第一个导航高亮
        }
    },
props:{
	arr:{
		type:Array,
		required:true,
		validator(val){
			if (val.length>=2&&val.length<=5) {
				return true
			}else {
				return false
			}
		}
	}
},
methods: {
        change(index, comName) {
            // 高亮切换
            this.activeIndex = index

            // 还要子传父，告诉父组件，comName数据应该展示是哪个组件
            console.log(comName)

            this.$emit('changeCom', comName)
        },
    },
	}
</script>

<style lang="less" scoped>
	.my-tab-bar {
		position: fixed;
		left: 0;
		bottom: 0;
		width: 100%;
		height: 50px;
		border-top: 1px solid #ccc;
		display: flex;
		justify-content: space-around;
		align-items: center;
		background-color: white;

		.tab-item {
			display: flex;
			flex-direction: column;
			align-items: center;
		}
	}

	.current {
		color: #1d7bff;
	}
</style>
